//
//  SceneDelegate.swift
//  Moments
//
//  Created by Jake Lin on 15/10/20.
//

import UIKit

class SceneDelegate: UIResponder, UIWindowSceneDelegate {
    var window: UIWindow?

    func scene(_ scene: UIScene,
               willConnectTo session: UISceneSession,
               options connectionOptions: UIScene.ConnectionOptions) {
        // Use this method to optionally configure and attach the UIWindow `window`
        // to the provided UIWindowScene `scene`.
        // If using a storyboard, the `window` property will automatically be initialized
        // and attached to the scene.
        // This delegate does not imply the connecting scene
        // or session are new (see `application:configurationForConnectingSceneSession` instead).

        guard let windowScene = (scene as? UIWindowScene) else { return }

        // Do not want to use private API `_removeSessionFromSessionSet` as memtioned on https://gist.github.com/HiddenJester/e5409ce2ca823b0003c59ce11a494b1d
        // Just conditionally check and replace with `UnitTestViewController` when running unit tests
        window = UIWindow(windowScene: windowScene)
        if UIApplication.shared.isRunningUnitTests {
            window?.rootViewController = UnitTestViewController()
        } else {
            window?.rootViewController = MomentsTimelineViewController()
        }
        window?.makeKeyAndVisible()

        // Handle Universal Links here if already opt into Scenes
        if let userActivity = connectionOptions.userActivities.first,
            userActivity.activityType == NSUserActivityTypeBrowsingWeb,
            let incomingURL = userActivity.webpageURL {
            let router: AppRouting = AppRouter.shared
            router.route(to: incomingURL, from: nil, using: .present)
        }
    }

    func sceneDidDisconnect(_ scene: UIScene) {
        // Called as the scene is being released by the system.
        // This occurs shortly after the scene enters the background, or when its session is discarded.
        // Release any resources associated with this scene that can be re-created the next time the scene connects.
        // The scene may re-connect later, as its session was not necessarily discarded
        // (see `application:didDiscardSceneSessions` instead).
    }

    func sceneDidBecomeActive(_ scene: UIScene) {
        // Called when the scene has moved from an inactive state to an active state.
        // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
    }

    func sceneWillResignActive(_ scene: UIScene) {
        // Called when the scene will move from an active state to an inactive state.
        // This may occur due to temporary interruptions (ex. an incoming phone call).
    }

    func sceneWillEnterForeground(_ scene: UIScene) {
        // Called as the scene transitions from the background to the foreground.
        // Use this method to undo the changes made on entering the background.
    }

    func sceneDidEnterBackground(_ scene: UIScene) {
        // Called as the scene transitions from the foreground to the background.
        // Use this method to save data, release shared resources, and store enough scene-specific state information
        // to restore the scene back to its current state.
    }
}
